As I stated here I do not believe that A-Rod's efforts even passed the minimal test of being non-frivolous. I would imagine that what happened here is this - counsel for MLB came to the same conclusion that I did and sent A-Rod's counsel a Rule 11 letter, stating that A-Rod's claims were frivolous and giving A-Rod 21 days to withdraw the claims or face a Rule 11 motion (where A-Rod and his attorneys would possibly have had to pay MLB's attorneys' fees if they lost the motion). A-Rod withdrew the claims.
Could something else have happened? Sure. But the original item I did was January 13, and the case was withdrawn 25 days later. If you assume that it took the law firm 7 days to put together the Rule 11 letter, the whole thing makes sense from a timing standpoint.
Or maybe A-Rod just decided that he needed to be classier and less selfish........